The lab maintenance is finished and the system comes back online. The police come to the island, but the investigation has made no progress. At last, however, Saikawa solves the mystery of the locked room and prepares to confront the culprit.

The truth behind the murders is revealed. Moe and Saikawa meet with the killer in virtual reality, and as they reveal the mysteries, they learn what kind of life Dr. Magata lived.

Time has passed since the incident at Magata Labs, and Saikawa and Nishinosono's daily life is returning. Then one day, Shiki visits Saikawa at the university library..